Write the equations: Two of Julie’s textbooks are a total of $65. The difference in price between the two books is $9. What is the cost of each book?

Question

Let ___ = _____________
Let ___=______________

Answer 1

Let x = the cost of the first textbook
Let y = the cost of the second textbook

Based on the given information, we can set up the following equations:
Equation 1: x + y = 65 (the total cost of the two textbooks is $65)
Equation 2: x - y = 9 (the difference in price between the two books is $9)